It is very frustrating, the virus companies have decided over the last year that SEMs are suspicious and it is posing a big problem for me lately.

I can assure you there are no viruses in any of them. If Norton has a submit button anywhere so they can be analysed by Norton's team, they should then be whitelisted in the next virus definitions update. Alternatively you can add them to the ignore list and it will then cease to scan them.

Sorry about it, I have submitted lots of files but have no control over whether they whitelist them...